potassium hexafluoroantimonate; sulfuric acid; acetic anhydride in acetonitrile T=45°C; 1 h; Product distribution / selectivity;

1: With potassium hexafluoroantimonate; sulfuric acid; acetic acid in water 0.5 h; 2: 4,4'-diphenylsulfide; bis-(phenyl)-sulfoxide With acetic anhydride in water T=20 - 75°C; 1.5 h; Product distribution / selectivity;

copper acetylacetonate in chlorobenzene 3 h; Heating;